As with most large-scale home renovation projects, you’ll need an architect to map out the exact layout and specs of your above-garage room, which is required in many municipalities. Some general contractors will serve as your architect, or they may bring on a residential architect to assist with the plans.

A structural engineer's report provides a professional assessment of a property's structural condition. It typically includes an evaluation of the foundation, key structural elements like roof trusses, floor joists, studs, beams, and rafters. The report will also contain a detailed description of the engineer's findings, often supported by photographs, and provide recommendations to correct any identified issues. Depending on the scope of the inspection, it might also include an assessment of property drainage, potential issues from environmental conditions like extreme weather or tree placement, and an estimated time and cost for any recommended repairs.

While Craftsman-style houses are bungalows, cottages typically aren’t, though they can be. But they also differ in other stylistic aspects. For instance, cottages usually have simpler designs and painted woodwork.

A floor plan is a less detailed illustration showing a building or room's layout from above, including elements like windows, doors, walls, and fixtures. It offers a simplified view for homeowners. In contrast, a blueprint is a more detailed, to-scale architectural drawing that includes all parts of the building plans, such as structural elements, construction details, and utility schematics. While a floor plan can be a type of view within a blueprint, the complete blueprint contains all the necessary details to turn the plan into a reality.